Ingersoll Rand introduced our first oil-free centrifugal compressor over 100 years ago in 1912. Over the decades we've continued to develop rugged, reliable, industry-leading Centac® centrifugal compressors. All Ingersoll Rand Centac centrifugal air compressors provide 100% oil-free compressed air by design. Centac air compressors are designed as fully packaged units including: an airend, a driver, an air cooling system, a self-contained lubrication system, and state-of-the-art, web-enabled Xe-Series controls. Centac centrifugal compressors are available in standard packages or designed and built to your specifications. No matter what the application, Ingersoll Rand Centac centrifugal compressors feature